Book at your own risk... if the host's insistence on communicating outside of Airbnb, sending check-in instructions by email, lack of government ID verified status, and instruction to avoid entering by the lobby aren't big enough red flags. It was clear that this place is not welcome to tourists and travellers, even to a point of having a sign stating it. Do your research: Property owners can be prosecuted if they rent their properties on a nightly or weekly basis, and one such platform is Airbnb. To avoid the lobby staff, the host instructed to enter through a fireman's back door to get to the elevator. Except when I went to check in, the back door was locked and the lobby staff wouldn't let me in. It was much past midnight and I had no place to stay for the night. Only things that redeemed this was that the host was responsive to messaging and cancelled the booking (after about an hour of conversation). Not worth the potential legal ramifications and risk of not having a place to stay, especially if you're a foreigner.